A5066752300- Oceanographic and Atmospheric Processes
- Climate variability and models
- Marine and coastal ecosystems
- Meteorological Phenomena and Simulations
- Marine and fisheries research
- Atmospheric Ozone and Climate
- Cryospheric studies and observations
- Calibration and Measurement Techniques
- Tropical and Extratropical Cyclones Research
- Coral and Marine Ecosystems Studies
- Ocean Acidification Effects and Responses
- Climate change and permafrost
- Microbial Community Ecology and Physiology
- Spectroscopy and Laser Applications
- Atmospheric and Environmental Gas Dynamics
- Hydrology and Watershed Management Studies
- Arctic and Antarctic ice dynamics
- Marine Biology and Ecology Research
- Geology and Paleoclimatology Research
- Precipitation Measurement and Analysis
- Spacecraft Design and Technology
- Coastal wetland ecosystem dynamics
- Soil Moisture and Remote Sensing
- Environmental and Sediment Control
- Impact of Light on Environment and Health
Health Sciences and Nutrition
2024
Commonwealth Scientific and Industrial Research Organisation
2024
CSIRO Oceans and Atmosphere
2011-2022
Global Science & Technology (United States)
2016
Sigma Space (United States)
2012-2013
Goddard Space Flight Center
2004-2008
University of Maryland, Baltimore County
2004-2008
University of Maryland, Baltimore
2007
University of California, Los Angeles
2002
Accurate prediction of snowpack status is important for a range environmental applications, yet model estimates are typically poor and in situ measurement coverage inadequate. Moreover, remote sensing spatially temporally limited due to complicating effects, including distance open water, presence wet snow, thick snow. However, through assimilation into land surface model, it possible capitalize on the strengths both approaches. In order achieve this, reliable uncertainty remotely sensed...
A major observed and predicted impact of climate change on marine species is the poleward shift in their distributions resulting changes community structure. Here, we used a Dynamic Bioclimate Envelope Model to project range exploited fishes invertebrates Western Australia. We combined published data expert knowledge predict current for 30 tropical, sub-tropical temperate that occur along coast Using outputs from both Regional Oceanographic Global Circulation Model, simulated distribution...
Abstract Ocean boundary currents are poorly represented in existing coupled climate models, partly because of their insufficient resolution to resolve narrow jets. Therefore, there is limited confidence the simulated response change by models. To address this issue, eddy-resolving Forecasting Australia Model (OFAM) was used, forced with bias-corrected output 2060s under Special Report on Emissions Scenarios (SRES) A1B from CSIRO Mark version 3.5 (Mk3.5) model, provide downscaled regional...
The ocean's western boundary current regions display the greatest rate of twentieth century warming and global climate models project that accelerated will continue with change. All existing change projections come from simulations do not fully resolve either these currents or their eddies. Using an Ocean Eddy‐resolving Model (OEM) captures dynamics East Australian Current (EAC) its eddies we show response Tasman Sea to differs what is projected a coarse resolution Global Climate (GCM). With...
Abstract The coastal area adjacent to the Changjiang River estuary is a high‐risk region for harmful algal blooms. Both discharge and Kuroshio intrusion influence hydrological conditions nutrient composition in this which could affect onset of diatom dinoflagellate However, current understandings on their roles regulating different microalgal blooms are limited. In study, changes stratification, water masses, ratio phosphorus nitrogen were examined during 2005 using ship cruise data....
Snow cover has a large influence on heat fluxes between the land and atmosphere because of its high albedo insulating thermal properties. Hence accurate snow representation in coupled land‐ocean‐atmosphere global climate models potential to greatly increase prediction accuracy. To this end, one‐dimensional extended Kalman filter analysis scheme been developed assimilate observed water equivalent into NASA Seasonal‐to‐Interannual Prediction Project (NSIPP) catchment‐based surface model. This...
The CFOSAT (China-France Oceanography SATellite) satellite mission, a successful cooperation between China and France, launched in 28 October 2018 has revealed the importance of directional observations waves winds at ocean surface. SWIM wave scatterometer provides detailed description energy direction wavelengths ranged from 50 to 1100 m. This presentation summarize oustanding acchievements mission on science operational applications. assimilation such into model enabled significant...
Abstract The parameter estimation problem for the coupled ocean–atmosphere system in tropical Pacific Ocean is investigated using an advanced sequential estimator [i.e., extended Kalman filter (EKF)]. intermediate model (ICM) used this paper consists of a prognostic upper-ocean and diagnostic atmospheric model. Model errors arise from uncertainty wind stress. First, state parameters are estimated identical-twin framework, based on incomplete inaccurate observations state. Two by including...
The role of stratified shear instability in maintaining the deep cycle turbulence immediately below equatorial mixed layer is examined by means linear stability analysis. Taylor‐Goldstein equation solved numerically, using observed currents and stratification from Tropical Instability Wave Experiment (TIWE). Multiple unstable modes are found, each associated with a local minimum gradient Richardson number. radiation due to fluxes momentum downward through Equatorial Undercurrent. frequency,...
Abstract. At present, global climate models used to project changes in poorly resolve mesoscale ocean features such as boundary currents and eddies. These missing may be important realistically the marine impacts of change. Here we present a framework for dynamically downscaling coarse change projections utilising near-global model that resolves these Australasian region, with coarser resolution elsewhere. A time-slice projection 2060s was obtained by adding anomalies initial conditions...
Abstract. Eddy-resolving global ocean models are highly desired for spatially-improved climate studies, but this is challenging because they require careful configuration and substantial computational resources. Model drift, partially related to insufficient model spin-up, imperfect physics or bias in surface forcing, can be problematic, leading contamination of change signals. In study, we adapt a near-global eddy-resolving general circulation model, originally developed short-range...
Abstract Two global ocean analyses from 1993 to 2001 have been generated by the Global Modeling and Assimilation Office (GMAO) Geophysical Fluid Dynamics Laboratory (GFDL), as part of Ocean Data for Seasonal-to-Interannual Prediction (ODASI) consortium efforts. The general circulation models (OGCM) assimilation methods in are different, but forcing observations same designed ODASI experiments. expendable bathythermograph Tropical Atmosphere (TAO) temperature profile assimilated. GMAO...
Abstract The Kuroshio Current, a vigorous western boundary current in the Pacific, is responsible for bringing high temperature, salinity, and phosphate‐rich open ocean water into East China Sea (ECS) when it flows past Taiwan generates branch current, known as Branch Current (KBC), which intrudes onto continental shelf of ECS. Based on observations numerical modeling, 1.5‐layer reduced‐gravity model evaluated modified to simulate flow pattern intrusion (KI) northeast Taiwan. We revised...
Abstract The first baroclinic mode Rossby wave is known to be of critical importance the annual sea level variability in southern tropical Indian Ocean (STIO; 0°–20°S, 50°–115°E). In this study, an analysis continuously stratified linear ocean model reveals that second also has significant contribution (as high as 81% mode). contributions residual high-order modes (3 ≤ n 25) are much less. superposition low-order (first and second) waves (BRWs) primarily contribute energy center at ~10°S...
In times of rapid change and rising human pressures on marine systems, information about the future state ocean can provide decision-makers with time to avoid adverse impacts maximise opportunities. An ecological forecast predicts changes in ecosystems its components due environmental forcing such as climate variability change, extreme weather conditions, pollution, or habitat change. Here, we summarise examples from several sectors a range locations. We describe need, approach, performance,...
The assimilation problem for the coupled ocean–atmosphere system in tropical Pacific is investigated using an advanced sequential estimator, extended Kalman filter (EKF). intermediate model used this study consists of upper-ocean and a steady-state atmospheric response to it. Model errors arise from uncertainty wind stress. Data applied idealized context produce time-continuous, dynamically consistent description model's El Niño–Southern Oscillation, based on incomplete inaccurate...
Abstract. At present, global climate models used to project changes in do not resolve mesoscale ocean features such as boundary currents and eddies. These missing may be important realistically the marine impacts of change. Here we present a framework for dynamically downscaling coarse change projections utilising model that resolves these Australian region. The here is ocean-only. feedback on air-sea fluxes explored by restoring surface temperature salinity, well calculated wind stress....
The S-NPP VIIRS instrument has successfully operated since its launch in October 2011. Day-Night Band (DNB) is a panchromatic channel covering wavelengths from 0.5 to 0.9 μm that capable of observing Earth scenes during both day and nighttime orbits at spatial resolution 750 m. To cover the large dynamic range, DNB operates low, mid, or high gain stages, it uses an onboard solar diffuser (SD) for low stage calibration. SD observations also provide means compute ratios low-to-mid mid-to-high...
The Visible Infrared Imaging Radiometer Suite (VIIRS) is a key sensor carried on Suomi NPP (National Polar-orbiting Partnership) satellite (http://npp.gsfc.nasa.gov/viirs.html) (launched in October 2011). VIIRS design draws heritage instruments including AVHRR, OLS, SeaWiFS and MODIS. It has on-board calibration components solar diffuser (SD) stability monitor (SDSM) for the reflective bands (RSB), V-groove blackbody thermal emissive (TEB), space view (SV) port background subtraction. These...
The recently launched (October 28, 2011) Suomi NPP (National Polar-orbiting Partnership) satellite has been operating nominally to daily collect global data. Visible Infrared Imaging Radiometer Suite (VIIRS) is a key sensor onboard the spacecraft. Similar heritage MODIS, VIIRS on-board calibration components including solar diffuser (SD) and stability monitor (SDSM) for reflective bands (RSB), V-groove blackbody thermal emissive (TEB), space view (SV) port background. This study examines...
Although global warming is leading to more frequent mass coral bleaching events worldwide, parts of the Great Barrier Reef (GBR) have consistently escaped severe bleaching. Modeling and satellite observations show that climate refugia are created by upwelling cooler water surface through interactions tides currents with dense reef structures. Here, we use a high-resolution nested regional ocean model investigate future status two relatively large refugia. On basis projections under...